Replace NULL with nullptr in all C++ files.

webrtc/modules/rtp_rtcp/source/rtp_format_vp8.cc

Index: webrtc/modules/rtp_rtcp/source/rtp_format_vp8.cc
diff --git a/webrtc/modules/rtp_rtcp/source/rtp_format_vp8.cc b/webrtc/modules/rtp_rtcp/source/rtp_format_vp8.cc
index a038d47179d441b877974ad32115724df7871bae..ea4583915203bb634930f5166a651d5774c24b96 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_format_vp8.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtp_format_vp8.cc
@@ -25,7 +25,7 @@ int ParseVP8PictureID(RTPVideoHeaderVP8* vp8,
                       const uint8_t** data,
                       size_t* data_length,
                       size_t* parsed_bytes) {
-  assert(vp8 != NULL);
+  assert(vp8 != nullptr);
   if (*data_length == 0)
     return -1;
 
@@ -48,7 +48,7 @@ int ParseVP8Tl0PicIdx(RTPVideoHeaderVP8* vp8,
                       const uint8_t** data,
                       size_t* data_length,
                       size_t* parsed_bytes) {
-  assert(vp8 != NULL);
+  assert(vp8 != nullptr);
   if (*data_length == 0)
     return -1;
 
@@ -65,7 +65,7 @@ int ParseVP8TIDAndKeyIdx(RTPVideoHeaderVP8* vp8,
                          size_t* parsed_bytes,
                          bool has_tid,
                          bool has_key_idx) {
-  assert(vp8 != NULL);
+  assert(vp8 != nullptr);
   if (*data_length == 0)
     return -1;
 
@@ -85,7 +85,7 @@ int ParseVP8TIDAndKeyIdx(RTPVideoHeaderVP8* vp8,
 int ParseVP8Extension(RTPVideoHeaderVP8* vp8,
                       const uint8_t* data,
                       size_t data_length) {
-  assert(vp8 != NULL);
+  assert(vp8 != nullptr);
   assert(data_length > 0);
   size_t parsed_bytes = 0;
   // Optional X field is present.
@@ -124,7 +124,7 @@ int ParseVP8Extension(RTPVideoHeaderVP8* vp8,
 int ParseVP8FrameSize(RtpDepacketizer::ParsedPayload* parsed_payload,
                       const uint8_t* data,
                       size_t data_length) {
-  assert(parsed_payload != NULL);
+  assert(parsed_payload != nullptr);
   if (parsed_payload->frame_type != kVideoFrameKey) {
     // Included in payload header for I-frames.
     return 0;
@@ -151,7 +151,7 @@ const bool RtpPacketizerVp8::separate_first_modes_[kNumModes] = {true, false,
 RtpPacketizerVp8::RtpPacketizerVp8(const RTPVideoHeaderVP8& hdr_info,
                                    size_t max_payload_len,
                                    VP8PacketizerMode mode)
-    : payload_data_(NULL),
+    : payload_data_(nullptr),
       payload_size_(0),
       vp8_fixed_payload_descriptor_bytes_(1),
       aggr_mode_(aggr_modes_[mode]),
@@ -160,12 +160,11 @@ RtpPacketizerVp8::RtpPacketizerVp8(const RTPVideoHeaderVP8& hdr_info,
       hdr_info_(hdr_info),
       num_partitions_(0),
       max_payload_len_(max_payload_len),
-      packets_calculated_(false) {
-}
+      packets_calculated_(false) {}
 
 RtpPacketizerVp8::RtpPacketizerVp8(const RTPVideoHeaderVP8& hdr_info,
                                    size_t max_payload_len)
-    : payload_data_(NULL),
+    : payload_data_(nullptr),
       payload_size_(0),
       part_info_(),
       vp8_fixed_payload_descriptor_bytes_(1),
@@ -175,8 +174,7 @@ RtpPacketizerVp8::RtpPacketizerVp8(const RTPVideoHeaderVP8& hdr_info,
       hdr_info_(hdr_info),
       num_partitions_(0),
       max_payload_len_(max_payload_len),
-      packets_calculated_(false) {
-}
+      packets_calculated_(false) {}
 
 RtpPacketizerVp8::~RtpPacketizerVp8() {
 }
@@ -669,7 +667,7 @@ bool RtpPacketizerVp8::TL0PicIdxFieldPresent() const {
 bool RtpDepacketizerVp8::Parse(ParsedPayload* parsed_payload,
                                const uint8_t* payload_data,
                                size_t payload_data_length) {
-  assert(parsed_payload != NULL);
+  assert(parsed_payload != nullptr);
   if (payload_data_length == 0) {
     LOG(LS_ERROR) << "Empty payload.";
     return false;